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Full Discussion: Reading In and Exec
Top Forums Programming Reading In and Exec Post 302175516 by ramen_noodle on Friday 14th of March 2008 08:50:59 AM
Old 03-14-2008
Quick example using a file with tab separated command and single argument. untested, but should get across the basic idea.

Code:
int main(int argc, char **argv<) {
pid_t chld;
char line[256];
char cmd[256], arg[256];
FILE *fd;

                    if (argc != 2) {printf("Error: You must provide a filename for this program.\n"); return -1;}
                    
                   if ( (fd = fopen(argv[1],"r")) == NULL) {return -1;}
                   while (fgets(line,256,fd) != NULL) {
                           if (sscanf(line,"%s\t%s",cmd,arg) != 2) {continue;}
                           if ( (chld = fork()) == 0) {
                             execl(basename(cmd),cmd,arg,NULL);
                           } else if (chld > 0) {
                              wait(NULL);
                           }
                           chld = 0;
                    }
                   fclose(fd);
                   return 0;
}

 

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LEARN ABOUT DEBIAN

pieboxlabeler

pieBoxLabeler(3tk)						pieBoxLabeler class						pieBoxLabeler(3tk)

__________________________________________________________________________________________________________________________________________________

NAME

       pieBoxLabeler - tkpiechart pie box style labeler class

SYNOPSIS

       stooop::new pieBoxLabeler canvas ?options?

       switched::configure pieBoxLabelerObject ?options?

       switched::cget pieBoxLabelerObject option

_________________________________________________________________

DESCRIPTION

       The  pie  box  style  labeler object is used as a slice label placer for a pie object and is passed to the pie constructor via its -labeler
       option (see the pie class manual).

       The labels are arranged in 2 columns below the pie graphics. Each label text is placed to the right of a rectangle, the background color of
       which matches its corresponding slice. The slice share value is placed to the right of the label text, separated by a semicolon. Each label
       is actually a canvasLabel object (see the canvasLabel class manual for further information).

       There is no need to delete a pieBoxLabeler object as it is automatically handled by the pie class.

       stooop::new pieBoxLabeler canvas ?options?
	      Creates a pieBoxLabeler object in the specified Tk canvas. The pieBoxLabeler object identifier is returned (referred to as pieBoxLa-
	      belerObject in this document).

       switched::configure pieBoxLabelerObject ?options?
	      Configures a pieBoxLabeler object or returns all the options with their current values if no options are passed as parameters.

       switched::cget pieBoxLabelerObject option
	      Returns an option value for the specified pieBoxLabeler object.

OPTIONS

       -font value
	      Specifies a font for the slice labels. If not specified, the default font is system dependent.

       -justify value
	      Specifies  how  to  justify  labels within their own column. Must be one of left, center or right. Defaults to left. For example, if
	      justification is right, all column labels right edges are aligned.

       -offset value
	      Specifies the distance between the pie graphics and the closest slice label. This value  may  be	specified  in  any  of	the  forms
	      described in the canvas COORDINATES manual section.

TAGS

       The labeler has the following specific tag (see the canvas manual page ITEM IDS AND TAGS section for more information):

       o      pieBoxLabeler(pieBoxLabelerObject)

SEE ALSO

       canvasLabel, pie, piePeripheralLabeler

KEYWORDS

       canvas, labeler, pie, slice

COPYRIGHT

       Copyright (c) 1995-2004 Jean-Luc Fontaine <jfontain@free.fr>

tkpiechart								6.6							pieBoxLabeler(3tk)
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